Cantaliver-margin for locomotive-arches.



LOGOMOTIVE ARCHES.--

APPLICATION FILED rzmn, I9l6- 3 Patented June 12, 191?.

2 SHEETS-SHEET- 1- E. P. STEVENS CANTALIVER MARGIN FOR LOCOMOTH/li ARCHES.

APPLICATlbN FILED FEB Il. I916- Patented June 12, 191?.

2 SHEETS-SHEET 2.

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CANTALIVER-MARGIN FOR LOCOMOTIVE-ARCHES.

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application filed February 11, 1918. Serial No. 77,6418.

7 To all whom it may conccm."

Be it known that l, Flnoon P. Srnvnns, a citizen of the United States, and a resie dent of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Cantaliver-Margins for Locomotive-Arches, of which the following is a specification. v

My invention relates to refractory brick arch constructions for the fireboxes of steam locomotives.

The invention herein described may be best classified as an improvement upon, or modification of, the cantaliver arch brick construction described and claimed in my prior application, Serial No. 757,822, Ol'lg'lnally filed March 31st, 1913, Serial No. 757,822, and renewed January 10, 1916, Se-

'I'leS of 1915, No. 71,378.

The object of this present invention is to provide a locomotive firebox arch of the type composed of refractory bricks supported by spaced arch tubes, and in which the marginal bricks, namely, the bricks which occupy the spaces between the outer arch tubes and the side sheets of the firebox, shall be engaged with or supported by the mam or body bricks of the arch in such manner as to be held in position independently of said side sheets.

In carrying out my invention I form the body bricks of the arch in a manner to provide them with stops or lugs on, or at, their tops, and with such bricks I combine separate marginal bricks which are formed to engage over said lugs or stops in manner to be rigidly sustained by the same and the supporting arch tubes, whereby said marginal bric s are supported in close proximity'to respective "side sheets of the firebox but without assistance therefrom.

5 is a top view of one of the body bricks shown in Fig. 2;-Fig. 6 is a sectional View smnlarto Fig. 2 but showing the invention 1n modified form ;F ig. 7 is a side View of one of the cantaliver bricks shown in Fig.

6;-Fig. 8 is an inner end View thereof Big. 9 is an outer end View thereof ,Qig. l0 depicts the bottom thereof Fig. 11 is a top view of one of the body bricks shown in Fig. 6;Fig. 12 is a View similar to Fig. 2, showing still another modification of the invention ;'-F ig. 13 is a side view of the cantaliver brick disclosed in Fig. 12 ;Fig. 14; is an inner end view ofsaid brick ;F ig. 15 is an outer end View thereof ;Fig. 16 depicts the bottom thereof ;-and Fig. 17 is a top view of one of the body bricks shown inFig. 12.

The familiar parts of a locomotive'are as follows: The grate, 2;the mud ring, 3;- the rear sheet, 4;the flue sheet, 5;-the crown sheet, 6;side sheets, 7, 7 ;-and the inclined water circulating arch tubes, 8. Reference is also made to the boiler shell indicated at 9;to the fuel door opening, 10 ;and to the fiues, 11'. As shown in Figs. 2, 6, and 12, there are several arch tubes, 8, the same being spaced across the firebox.

The body portion of the refractory arch is composed of fire bricks, A, which rest'upon and close the spaces between the tubes, 8, 8. The outermost tubes are not placed directly against the side sheets, but are spaced therefrom a considerable distance, to afford free access to the stay-bolts (not shown) of the side sheets. However, the space between an outer tube and adjacent side sheet is usually less than the space between the several tubes, 8. In other words, the body bricks, A, practically in all cases are of much greater-length than the spaces, at, between the outer tubes and the side sheets. This being the case, such body bricks, A, cannot Y which constitute the major portion of the arch body are herein differentiated by the name main or bodybricks.

. As the marginal bricks are thus supported by and project outwardly from the arch body, the are appropriately called cantaliver bric s. The several marginal bricks shown in the drawings are indicated by the common reference letter, B. In general, I prefer thateach marginal brick shall be engaged with the ends of the two body bricks, A, but the following description will show that single body bricks may support or co-v act with respectively individual cantaliver marginal bricks.

The several examples depicted in Figs. 2 to 17 clearly disclose the fact that the herein described desirable functions may be performed by body bricks and cantaliver bricks of various forms and which are interlocked in various ways.

Referrin now to Figs. 2 to 5, inclusive,-- .the body hricks there shown correspond with those depicted in Fig. 1. Where four arch tubes are used, the middle body brick, A, may be of any desired form. This is true in all the cases shown. Each of the body bricks, a, of Fig. 2, has its outer endformed with a socket -or groove, a, which substantially fits the top of the outermost arch tube, 8. On the top of ,the brick is an upstanding lug a which may extend entirely across the brick, as shown in Fig.

. 5. The extreme end presents a preferably ,inclined bracing surface, (i To interlock and coact with a body brick of thedescribed construction, I provide a cantaliver brick,

b, which has a groove, 6, in its under side, I

and the inner end, 11 of which comprises a hook which engages over the lug or stop, a The intermediately positioned depending part, 6 is shaped to rest against the shoulder, a", of the body brick. From that point the brick extends outwardly and terminates just short of the side sheet, 7 The under surface, 6', is preferably inclined from the part, b", to the point, t. brick may be lightened and also made to serve as a gas-mixing device by providing it with a gas mixingpocket, b, in its under surface. An advantage of the construction shown in Fig. 2 is that the bricks, b, may

be moved on the longitudinally, extended seat formed by the lugs or ribs, a and shoulders, (1?, of several body bricks. In other words, the brick, b need not be fastened in any given longitudinal position on the top of thearch.

The

- 7 istener I In contrast with the feature last above mentioned, I may form the cantaliver bricks in manner to be held against movement longitudinally with respect to the body bricks and supporting tube. This advantage may be secured by using a body brick,

'0, whichis provided with a recess, 0', in

its to near its outer end. The presence of this recess provides a lug or stop ortion, 0 for engagement with the cantaliver brick, dr The brick, d, is provided with a hook-like lug, d',--to co-act with the lug, c and with a shoulder, (1 to co-act with the outer side of the tube, 8'. I refer that the recesses, (i in the outer en of the brick shall be formed in the sides of the brick, and leave a middle strut portion, (2*; in contrast with the recess, b", of the brick,

.6. Before leaving the discussion of Figs.

6 to 11, I call attention to the fact that the body bricks, 0, contain symmetrical recesses,

c, and also an opposed recess, 0. Where this deSlgIl is used, all of the body bricks of the arch may be of the same form, there being no projections beyond the main cut lines of the bricks to interfere with their use in any of several positions.

A further modification, shown in Figs. 12 to 17 comprises body bricks, e, of the arched or upwardly bowed type, and cantaliver bricks, f, of a form nicely adapted for use erably extend to a low point against the side of the arch tube 8".

It will be noted that in'all of the cantaliver brick arch constructions here de- 7 picted, the cantaliver brick is characterized.

by a hanging hook at its inner end, adapted to engage an upstanding stop or lug formed in or on the complementary body brick or bricks, and no support is required from the firebox. side sheets.

As various modifications of my invention will readily suggest themselves to one who is skilled in the art, I do not limit the invention to the specific constructions herein shown and described. 1

Having thus described my invention, I claim as new. and desire to secure by Let ters Patent 1. The locomotive firebox and its contained arch tubes, in combination with a each brick in each outer row having upon its 'top a cantaliver-brick-engaging stop,

' cantaliver bricks adapted for support from their inner ends only and each having upon manner its inner end a down-turned hook for engagement with the stop upon a respective body brick, and each cantaliver brick also having upon its inner end a depending stop portion which contributes to its support.

2. In a locomotive firebox arch, a body brick having an upstanding stop on its end, in combination with a cantaliver marginal brick formed with a down-turned hook on.

its inner end to engage over said stop on the body brick and provided with a depending stop portion for. co-action with an arch tube to support said cantaliver brick.

3. In a locomotive firebox arch, a body brick having an upstanding stop on its end, in combination with a cantaliver marginal brick formed with a down-turned hook on its inner end to engage over said stop the body brick and provided with a depending stop portion for co-action with the.

end of the body brick and an arch tube to support said cantaliver brick. J

4. In a locomotive firebox arch, a cantaliver marginal brick formed with a downturned hook on its inner end to engage a body brick, and provided with a depending stop portion for co-action with the end of a body brick and the outer side of an arch tube to support said cantaliver brick.

In testimony whereof, Ihave hereunto set my hand this 8th day of Janna 1916.

. ENOGH P. STE NS. 

